考察了沉积 沉淀法制备的Au Al2 O3催化剂在O2 存在下催化C3H6 还原NO的反应 ,并用程序升温脱附 质谱 (TPD MS)手段研究了吸附于催化剂上的NO或NO O2 的脱附性能 .结果表明 :在O2 存在的条件下 ,对于C3H6 还原NO的反应 ,1%Au Al2 O3的催化活性最高 ,可于 3 75℃左右使NO生成N2 ,转化率达 60 % .这与催化剂对所吸附NO的脱附性能密切相关 ,N2 O可能是C3H6 还原NO反应过程中产生的比较稳定的中间体 The Au Al 2 O 3 catalyst prepared by the deposition precipitation method was used to catalyze the reduction of NO by C3H6 in the presence of O2. The desorption performance of NO or NO O2 adsorbed on the catalyst was investigated by temperature-programmed desorption-mass spectrometry (TPD MS) The results showed that 1% Au Al 2 O 3 had the highest catalytic activity for the reduction of NO by C3H6 in the presence of O2, which led to the formation of NO at about 755 ° C and the conversion of 60% Is closely related to the desorption performance. N2 O may be a relatively stable intermediate produced during the reduction of NO by C3H6